Clip fastener for corrugated sheets



1941- H. T. RICHARDSON CLIP FASTENER, FOR CORRUGATED SHEETS Filed Sept. 10, 1940 ENTOR I ,F/(AAEAMM ATTORNEY Patented Aug. 26, 1941 UNITED "STATES. PATENT OFFICE CLIP FASTENER FOR CORRUGATED SHEETS Harlow 1:. Richardson, North Plainfield, N. 1., as-

signor to lhe Ruberoid 00., New York, N. Y., a corporation of New Jersey Application September 10, 194p, Serial No. 356,161

3 Claims. (Cl. 189-35) This invention relates to clip fasteners for se curing corrugated sheets, particularly corrugated asbestos-cement sheetsto the metal purlins of the skeleton frame work of roofs andsidewalls of buildings, especially industrial buildings such as factories, warehouses and the like.

Corrugated asbestos-cement sheets are extensively used as rooflngs and sidings of such structuresbecause of the fact that they are fireproof, weather-proof, resistant to corrosion, relatively light in weight, economical, easily applied,

and pleasing in appearance.

There has long been need for a simple, inexpensive, and strong clip for fastening corrugated asbestos-cement sheets to metal supports or purlins, such as channels, angles, and I-beams, particularly where the flanges of the supporting members point up.

The clips that have heretofore been for this purpose generally have been made of'stamped flat metal and of more or less complicated design. In many cases they require the use of two fastening bolts, thus increasing the costof application as well as the cost of the clip. Except with certain clips of compllcated'design, the bolts areso far removed from the support that the resultant fastening is weak. Another objectionable feature is that the sharp edges of such clips rest against the asbestos-cement sheets which. may

be injured thereby;

'It is the general object of my invention to provide an improved clip fastener which overcomes these objections. A more specific object is. to provide an improved clip fastener which has great strength and rigidity and has a high section modulus.

According to my invention, 1 provide a clip fas-- tener of non-planar transverse cross-section throughout its length which is highly resistant to bending.

Other objects and advantages of the invention and the corrugated sheet being shown in section;

Fig. 2 is a cross-sectional view taken on the line 2-2 of Figure 1;

Fig. 3 is a perspectivejview of the preferred form of clip fastener; I

vFig. 4 is a similar view of a modified form of clip fastener; and

Figs. 5. 6 and 7 are. cross-sectional fragmentary views. of other modified forms.

Having reference now to the drawing, and particularly Figs. 1 and 2 thereof, l 0 indicates a corrugated asbestos-cement roofing sheet, and II represents-a metal supporting member on which the corrugated sheet is supported and to which it is secured by the clip fastener I2 of this inven-' tion.

while I have described the invention with particular reference; to I its application to roofing sheets, it-is to be understood that the clips. may

also beused to fasten sidings. I

It will .be observed that the flange of the supporting member II, which member may be a channel, angle, I-beam, or like structural element, points upward at the angle of the pitch of the roof. While the improved clip is particularly designed for use with supporting members having upwardly pointing flanges, it is to be under-.-

stood that the invention is not necessarily limited in this respect.

The clip fastener I2 is made of a single piece ,of steel or other suitable metal, preferably galvanized, which is of concave or incurved transverse cross-section throughout its entire length.

The metal piece is.bent or shaped to form two -'oif-set oppositely extending legs l3 and I4 and a connecting portion It, as shown in Fig. 3. It will be noted that all of these parts are non-planar in transverse cross-section throughout, thus forming a structure of great rigidity and strength. Further to enhance the strength and rigidity of the structure, it will be seen on reference to 'Fig. 2

I that the sides of the concave sheet-supporting willappear from the following description there --of, reference being had tothe accompanying drawing in which:

.Figure 1 is a side view of -a preferred form of 5 clip in applied position, the supportingmember leg it of the clip extend at right angles or perpendicular' to the oppositely inclined walls of the corrugation in which said leg is set, and that they which the corrugated sheet rests. a

In the applied position of the fastener, the inclined faces it. of the upper leg II- rest approximately flush against the underside of the corrugated sheet III. -Since the faces it are smooth and are inclined to correspond to the angle of the corrugations, they afford extended bearing surfaces which will not injure the covering sheet terminate in inclined plane surfaces It upo when the bolt i1 is tightened. The edges l8 of the lower leg I bear. against the underside of the flange of the support H.

The leg I! has an opening I! for passage of the bolt II. This opening is located as closely as possible to the connecting portion l5, being spaced therefrom only a distance suflicient to permit of screwing the nut 2| tightly on the threaded end of the bolt; Since the bolt is located close to the support II, the clip leg I has only, avery short eflective leverage or bending moment, thus increasing the strength of the assembly and preventing dislodgment of the covering sheet by wind pressure.

The bolt I1 is preferably provided with the usual flat steel washer 2| and concave lead washer 12. The latter serves as a cushion between the bolt and the corrugated sheet.

In the modification shown in Fig. 4, the clip i2, instead of being concavely curved in transverse cross-section, has a transverse section substantially in the form of a truncated V. Fig. 8 shows a clip of substantially U-shaped transverse section, while Fig. 7 shows one that is substantially W-shaped in section.

Fig. 5 shows a clip that is convexly curved in transverse cross-section. In the use of a clip of this form the concave surfaces of the two legs of the clip contact the undersides of the corru gated sheet and the support, respectively.

The various forms of the clip herein described have a common characteristic in that they are non-planar in transverse cross-section throughout their length, that is to say, both legs as well as the connecting portion of the clips are not flat in section.

While I have illustrated several embodiments of the invention, it will he understood that it may asbestos-cement sheet to a support, comprising two oppositely directed legs and a connecting portion, all of substantially uniform non-planar cross-section throughout, one of said legs being adapted to engage the support, the other of said legs being adaptedv to bear against the corrugated sheet and having upwardly diverging side portions disposed in planes substantially perpendicular to the oppositely inclined walls of the corrugations of the sheet.

2.- A clip fastener for securing a corrugated asbestos-cement sheet to a support, comprising two oppositely directed legs and a connecting portion, all of substantially uniform non-planar cross-section throughout, one of said legs being adaptedto engage the support, the other of said legs being adapted to bear against the corrugated sheet and having upwardly diverging side portions disposed in planes substantially perpendicular to the oppositely inclined walls of the corru gations of the sheet, said side portions terminating in inclined faces that correspond substantially to the angle of the corrugations against which they are adapted to bear.

' 3. A structural assembly comprising corrugated asbestos-cement sheets. supports for the sheets,.

and clips for securing the sheets to the supports, each clip having two offset legs and a connecting portion, one of said legs engaging the under surface of a support, the other leg being set in a corrugation and having upwardly diverging side portions'disposed in planes substantially perpendicular to the walls of the corrugatlonysaid side portions having inclined upper faces providing extending bearing surfaces upon which the corrugation rests, each clip being secured to the corrugated sheet by asingle bolt passing through the sheet and its contacting clip-leg at a point close to the support.

HARLOW '1. RICHARDSON. 

